论文部分内容阅读
V-notches of bonded dissimilar materials are frequently encountered in engineering applications,such as in welded connections and structures strengthened with fiber reinforce polymer plates.In such cases,there exists strong stress concentration near the sharp notch and the interface end.In particular,the peak stress at the notch tip is singular according to the theory of elasticity.For evaluating fatigue strength of the structures,the stress distributions and the generalized stress intensity factors(SIFs)around the tip are important mechanical quantities to be determined.Since there exist multiple stress singularities at a general V-notch structure,it is difficult to model the singular stress field by the conventional methods.